1. A base station connected with a gateway that is also connected with another base station, the base station comprising: a receiving unit that receive s a message from the gateway; 5 and a transmitting unit that transmits, to the gateway, a Path Switch Request message that includes a Request Type IE and at least either one of an ECGI and a TAI indicating a location of a terminal device when the terminal device is moved from a cell covered by the 10 another base station.

2. A base station connected with a gateway that is also connected with another base station, the base station comprising: a receiving unit that receive s a message from the gateway; 15 and a transmitting unit that transmits, to the gateway, first information on a location of a terminal device and second information on a change of a cell when the terminal device is moved from the cell covered by the another base station. 20

3. The base station according to claim 2, wherein the second information is information on a condition for the gateway to transmit the first information to a n uplink device that is connected with the gateway. 25

4. The base station according to claim 2 or 3, where in the second information is information that is included in a Request Type IE. 22

5. The base station according to any one of claims 2 to 4, wherein the first information is at least either one of an ECGI or a TAI. 5 6. The base station according to any one of claims 2 to 5, wherein the transmitting unit adds the second information to a Path Switch Request message, and transmits the Path Switch Request message to the gateway. 10 7. The base station according to any one of claims 2 to 6, wherein the gateway is an HeNB-GW.

8. The base station according to any one of claims 2 to 7, wherein the another base station is an HeNB . 15

9. A gateway that terminates a first base station and a second base station, the gateway comprising: a transmitting unit that transmit s a message to the second base station; and, 20 a receiving unit that receives, from the second base station, first information on a location of a terminal device and second information on a change of a cell when the terminal device moves from the cell covered b y the first base station to the cell covered by the second base station. 25

10. A gateway in a communication system comprising a first base station, a second base station, the gateway connected with the first base station and the second base station, and a n uplink device connected with the gateway, the gateway comprising: 23 a receiving unit that receives a Path Switch Request message from the second base station when a terminal device moves from a cell covered by the first base station to a cell covered by the second base station; and 5 a transmitting unit that transmits, to the uplink device, the terminal device’s location information that is included in the Path Switch Request message. Dated this 20th day of October 2017

[Document Name] DESCRIPTION
[Title of Invention] COMMUNICATION APPARATUS,
COMMUNICATION SYSTEM, CONTROL METHOD
[Technical Field]
5 [0001]
The present invention relates to a communication apparatus, a
communication system, and a control method in a radio
communication network. [Background Art]
10 [0002]
There are various services to be provided to terminal devices
depending on locations of the terminal devices. Therefore, a base
station or the like needs to collect and notify information on a
current location of a terminal device. NPL 1 discloses Information
15 Element (Request Type) that includes a condition for a base station
to transmit, to an uplink device, the information on the location of
the terminal device (hereinafter referred to as “the location
information on the terminal device”). Specifically, an MME
(Mobility Management Entity) designates a condition (Event
20 parameter on Request Type IE) for the eNB (eNodeB) to transmit, to
the MME, the location information on the terminal device. The
eNB transmits, to the MME, the location information on the terminal device according to the designation. [0003]
25 Hereinafter, descriptions are based on an example in which an
MME designates a condition (Event parameter) that an eNB
transmits a location information on a terminal to the MME, and the
eNB transmits the location information to the MME at each time a
serving cell is changed . The terminal device conducts a handover

3 (hereinafter referred to as “Handover” or “HO”) from the eNB (also
referred to as “source eNB”) to another eNB (also referred to as
“Target eNB”), so that the serving cell is changed. Conduction of
the handover by the terminal device enables satisfying the condition
5 for the eNB to transmit the location information on the terminal
device to the MME, and therefore, a handover-destination eNB
transmits the location information on the terminal device to the
MME.
[C it ation Li st ]
10 [Patent Literature]
[0004]
[PTL 1] Japanese Unexamined Patent Publication (Kokai)
No.2013-051670
[Non Patent Literature]
15 [0005]
[NPL 1] 3GPP TS36.413 v12.4.0
[NPL 2] 3GPP TS36.300 v12.4.0
[Summary of Invention]
[Technical Problem]
20 [0006]
In the meantime, NPL 2 discloses an HeNB-GW (Home
eNodeB GateWay) that aggregates one or more HeNBs (Home
eNodeB). The HeNB-GW has a function to terminate a processing
of S1 Path Switch message at the time of an X2HO between
25 subordinate HeNBs.
[0007]
In an architecture which does not have any gateway between
the base station and the uplink device, each device can transmit and
receive the location information on the terminal device by the

4
operation disclosed in NPL 1. On the other hand, NPLs 1 and 2 do
not disclose at all, in the architecture which has the gateway
between the base station and the uplink device, how the gateway
operates to transmit the location information on the terminal device
5 when the terminal device conducts the X2HO from the base station
that is not under the gateway (hereinafter referred to as “external
base station”) to the base station that is under the gateway.
[0008]
Therefore, in the architecture which has the gateway between
10 the base station and the uplink device, the gateway may not
determine whether to transmit, to the uplink device, the location
information on the terminal device when the terminal device
conducts the X2HO from an external base station to the base station
that is under the gateway. In other words, in the architecture
15 which has the gateway between the base station and the uplink
device, when the terminal device conducts the X2HO from the external base station to the base station under the gateway, the gateway may not appropriately tr ansmit, to the uplink device, the location information on the terminal device when terminating the
20 processing of the S1 Path Switch message that is transmitted from a
destination base station at the time of the X2HO between the base stations under the gateway. [0009]
Further, using an alternative expression, it can also be said
25 that the base station cannot transmit, to the gateway, information for
determining whether to transmit, to the uplink device, the location information on the terminal device when th e terminal device conducts the X2HO from the external base station to the base station that is under the gateway.

5 [0010]
Whereat, one of objects to be achieved through example
embodiments described in the present description is to provide a
gateway device, a base station, a communication system and the like
5 which enable the gateway to appropriately transmit information on a
location of a terminal device, in an architecture which has a gateway
between the base station and a n uplink device.
[Solution to Problem]
[0011]
10 A base station, according to the present example embodiment,
is the base station connected with a gateway that is also connected with another base station, the base station compris es:
a receiving unit that receive s a message from the gateway;
and
15 a transmitting unit that transmits, to the gateway, a Path
Switch Request message that includes a Request Type IE and at least
either one of an ECGI and a TAI indicating a location of a terminal
device when the terminal device is moved from a cell covered by the
another base station.
20 [0012]
A base station, according to the present example embodiment, is the base station connected with a gateway that is also connected with another base station, the base station compris es:
a receiving unit that receive s a message from the gateway;
25 and
a transmitting unit that transmits, to the gateway, first information on a location of a terminal device and second information on a change of a cell when the terminal device is moved from the cell covered by the another base station.

6 [0013]
A gateway, according to the present example embodiment, is
the gateway in a communication system comprising a first base
station, a second base station, the gateway connected with the first
5 base station and the second base station, and an uplink device
connected with the gateway, the gateway compris es:
a receiving unit that receives a Path Switch Request message
from the second base station when a terminal device moves from a
cell covered by the first base station to a cell covered by the second
10 base station; and
a transmitting unit that transmits, to the uplink device, the terminal device’s location information that is included in the Path Switch Request message.
[Advantageous Effects of Invention]
15 [0014]
According to the above described example embodiments, the
gateway can appropriately transmit information on the location of
the terminal device, in the architecture which has the gateway
between the base station and the uplink device.
20 [Brief Description of Drawings]
[0015]
Fig.1 is a configuration diagram of a communication system according to first example embodiment.
Fig.2 is a block diagram of a base station according to the
25 first example embodiment.
Fig.3 is a block diagram of a gateway according t o the first example embodiment.
Fig.4 is an example of Request Type according to the first example embodiment.

7 Fig.5 is an example of Path Switch Request message
according to the first example embodiment.
Fig.6 is a sequence diagram of operations of the
communication system according to the first example embodiment.
5 Fig.7 is the configuration diagram of the communication
system according to the first example embodiment.
Fig.8 is a block diagram of a gateway according to a second example embodiment.
Fig.9 is a sequence diagram of operations of a communication
10 system according to the second example embodiment.
Fig.10 is a block diagram of a gateway. [Description of Embodiments] [0016]
Hereinafter, specific example embodiments are described in
15 details with reference to the drawings. In each drawing, an
identical or corresponding component is denoted by an identical
reference numeral, and duplicated description is omitted as needed
to cl ar if y th e des criptio n.
[0017]
20 A plurality of example embodiments described below may be
carried out independently or appropriately combined to be carried
out. The plurality of example embodiments have new features
which are different from one another. Therefore, the plurality of
example embodiments are used for achieving objects or solving
25 problems which are different from one another, and are used for
yielding advantageous effects which are different from one another. [0018]
Fig.1 illustrates a configuration example of the

8
communication system according to the present example
embodiment. The communication system provides a
communication service, for example, sound communication or
packet data communication, or both thereof. Referring to Fig.1,
5 the communication system includes a fir st base station 100, a second
base station 200, a gateway 300, a terminal device (also referred to
as UE or User Equipment) 400 and an uplink device 500.
[0019]
Note that the gateway 300 has a function to terminate the first
10 base station 100 and the second base station 200. Further, the
uplink device 500 is connected with the gateway 300. [0020]
Fig.2 illustrates an example configuration of the second base station 200 according to the present example embodiment.
15 [0021]
The second base station 200 has at least a receiving unit 20 and a transmitting unit 21. [0022]
The receiving unit 20 is connected to external devices in a
20 wired or wireless manner and receives various pieces of information
from the external devices. In the present example embodiment, the
receiving unit 20 can receive various messages at least from the gateway 300. [0023]
25 The transmitting unit 21 transmits, to the gateway 300,
information on the condition (Event parameter of Request Type IE) for the gateway 300 to transmit, to the uplink device 500, information on the location of the terminal device 400 (hereinafter referred to as “the location information on the terminal device 400”)

9
(hereinafter referred to as “condition information”). Note that,
when the terminal device 400 moves from the first base station 100
to the second base station 200, the transmitting unit 21 transmits the
condition information to the gateway 300. Specifically, for example,
5 after the second base station 200 receives Handover Requset
message from the first base station 100 and then transmits Handover
Requset ACK message to the first base station 100, the transmitting
unit 21 may transmit the condition information to the gateway 300.
[0024]
10 Fig.3 illustrates a configuration example of the gateway 300
according to the present example embodiment. [0025]
The gateway 300 at least includes a transmitting unit 30 and a receiving unit 31.
15 [0026]
The transmitting unit 30 can transmit various messages to the second base station 200. [0027]
The receiving unit 31 receives the condition information from
20 the second base station 200.
[0028]
Note that the condition information may be information that
is included in Request Type IE. Fig.4 illustrates an example of the
condition information included in Request Type IE. Here, the
25 condition information corresponds to Event information illustrated
in Fig.4. The Event represents a condition that a device receiving
information illustrated in Fig.4 transmit s the location information
on the terminal device 400 to another device. The Event is
information indicating any one of “Direct”, “Change of serving cell”

10 and “Stop Change of serving cell.”
[0029]
Further, when the Event is information indicating “Direct”,
the base station that has received the information transmits the
5 location information on the terminal device 400 to the uplink device
500 or the gateway 300. [0030]
When the Event is information indicating “Change of serving
cell”, the base station that has received the information transmits
10 the location information on the terminal device 400 to the uplink
device 500 or the gateway 300 if the serving cell is changed. [0031]
When the Event is information indicating “Stop Change of
serving cell,” the base station that has received the information
15 stops transmitting the location information on the terminal device
400 to the uplink device 500 or the gateway 300. [0032]
Note that the location information on the terminal device 400
may be at least either an ECGI (E-UTRAN Cell Global ID) or a TAI
20 (Tracking Area ID).
[0033]
Further, the condition information may be included in a Path
Switch Request message. As an example, Fig.5 illus trates an
example of the condition information that is included in a Request
25 Type IE and the Request Type IE that is included in the Path Switch
Request message. [0034]
Note that the gateway 300 may be an HeNB-GW, the first base station 100 and the second base station 200 may be HeNBs, and the

11 uplink device 500 may be an MME.
[0035]
Next, operations of the communication system according to
the present example embodiment will be described with reference to
5 Fig.6. As an example, Fig.6 illustrates a case of the condition
information that is included in the Request Type IE and the Request
Type IE that is included in the Path Switch Request message.
[0036]
When the terminal device 400 conducts the X2HO from the
10 external base station to the first base station 100 and further
conducts X2-handover from the first base station 100 to the second
base station 200, at step S10, the first base station 100 transmits, to
the second base station 200, the Handover Request message. The
Handover Request message includes the Request Type IE. Note
15 that the Request Type IE includes the condition information.
[0037]
At step S20, the second base station 200 transmits, to the first base station 100, the Handover Request Ack message. [0038]
20 At step S30, the second base station 200 transmits the Path
Switch Request message to the gateway 300. The Path Switch
Request message includes the Request Type IE. Note that the
Request Type IE includes the condition information. [0039]
25 Note that the gateway 300 which receives the Path Switch
Request message from the second base station 200 conducts a process of a path switching from the first base station 100 to the second base station 200, and further, based on the condition information include d in the Path Switch Request message,

12 determines whether to transmit the location information on the
terminal device 400 to the uplink device 500. Specifically, when
the condition information in the Path Switch Request message that is
received from the second base station 200 indicates that the serving
5 cell is changed under a condition for the gateway 300 to transmit the
location information on the terminal device 400 to the uplink device
500, the gateway 300 conducts operations of step S40. On the
other hand, when the condition information in the Path Switch
Request message that is received from the second base station 200
10 indicates that the serving cell is not changed under the condition for
the gateway 300 to transmit the location information on the terminal device 400 to the uplink device 500, the gateway 300 conducts operations of step S50 and steps thereafter instead of conducting operation of step S40.
15 [0040]
At step S40, the gateway 300 transmits the location information on the terminal device 400 to the uplink device 500. Note that the location information on the terminal device 400 ma y be included in the Location Report message.
20 [0041]
At step S50, the gateway 300 transmits the Path Switch Request Ack message to the second base station 200. [0042]
At step S60, the second base station 200 transmits an UE
25 Context Release message to the first base station 100.
[0043]
According to the present example embodiment, for example,
following problems can be solved. Fig.7 illustrates an example
communication system. The communication system illustrated in

13 Fig.7 includes an MME1, an HeNB-GW2, an eNB3, an HeNB4, an
HeNB5 and a UE6.
[0044]
The HeNB4 and the HeNB5 are terminated by the HeNB -GW2.
5 On the other hand, the eNB3 is not terminated by the HeNB -GW2.
The MME1 is connected with the eNB3 and the HeNB-GW2. First,
when the UE6 is connected with the eNB3, the MME1 transmits, to
the eNB3, information on condition (Event parameter of Request
Type IE) for reporting, to the MME1, the location information on the
10 UE6 (hereinafter referred to as “condition information”). Note
that the condition information may be included in the Location Reporting Control message. [0045]
Hereinafter, as an example, description is based on an
15 example where the condition information is equivalent to a change
of the serving cell (Event=Change of serving cell). [0046]
When the UE6 conducts a handover from the eNB3 to the HeNB4, the HeNB4 transmits the Path Switch Request message to
20 the HeNB-GW2. The Path Switch Request message includes the
location information (ECGI and TAI) on the UE6. The HeNB-GW2
that receives the Path Switch Request message then transmits the Path Switch Request message to the MME1 for switching a path established between the eNB3 and the MME1 to a path between the
25 HeNB-GW2 and the MME1. The Path Switch Request message
transmitted from the HeNB-GW2 also includes the location
information (ECGI and TAI) on the UE6. Accordingly, the
HeNB-GW2 can transmit the location information on the UE6 to the MME1.

14 [0047]
Alternatively, when the UE6 conducts a handover from the
HeNB4 to the HeNB5, the HeNB5 transmits the Path Switch Request
message to the HeNB-GW2. Here, the handover from the HeNB4 to
5 the HeNB5 is terminated at the HeNB-GW2 because the HeNB4 and
the HeNB5 pertain to the same HeNB-GW2. In other words, when
the UE6 conducts the handover from the HeNB4 to the HeNB5, a
device at a level higher than that of the HeNB-GW2 does not need to
switch the path. Therefore, the HeNB-GW2 does not transmit the
10 Path Switch Request message to the MME1. Accordingly, in this
case, the MME1 does not receive the location information on the UE6. [0048]
Further, as a trigger for the base st ation (for example, eNB
15 and HeNB) to transmit the location information on the UE to the
uplink device (for example, MME), the Location Report message
may be transmitted in response to receiving the Location Reporting
Control message from the uplink device. However, at the time of
the X2HO, the Location Report message is not transmitted because
20 when an S1AP message such as the Path Switch Request message is
transmitted, such message includes an ECGI (E -UTRAN Cell Global
ID) or a TAI (Tracking Area ID). Therefore, in the case that the
UE6 conducts the handover from the HeNB4 to the HeNB5, when the HeNB-GW2 receives the Path Switch Request message, not only
25 switching of paths in the HeNB-GW2 but also determining whether
to transmit the location information on the UE6 to the MME1 is
needed. However, according to the current standard 3GPP (3rd
Generation Partnership Project), the HeNB -GW2 does not have
information needed for the determination. Therefore, the

15 HeNB-GW2 may not determine whether the location information on
the UE6 needs to be transmitted to the MME1.
[0049]
As a solution to the above described problem, according to
5 the present example embodiment, the second base station 200
transmits the condition information to the gateway 300, so that the
gateway 300 can determine whether to transmit the location
information on the terminal device 400 to the uplink device 500.
Accordingly, the gateway 300 can appropriately transmit the
10 location information on the terminal device 40 0 to the uplink device
500. [0050]
In the first example embodiment, the base station transmits,
15 to the gateway, information on the condition for the gateway to
transmit the location information on the terminal device to the uplink device, thereby the gateway can appropriately transmit the location information on the terminal device to the uplink device. [0051]
20 Subsequently, according to the second example embodiment,
when the gateway receives the Path Switch Request message fro m the subordinate base stations, the gateway, by necessity, transmits, to the uplink device, the location information on the terminal device to enable the gateway to certainly transmit, to the uplink device, the
25 location information on the terminal device.
[0052]
Note that the configuration example of the communication
system according to the present example embodiment is the same as
that of the first example embodiment. Further, a first base station

16 110, a second base station 210, a gateway 310, a terminal device 410
and an uplink device 510 of the present example embodiment
respectively correspond to the f irst base station 100, the second
base station 200, the gateway 300, the terminal device 400 and the
5 uplink device 500 of the first example embodiment.
[0053]
Fig.8 illustrates a configuration example of the gateway 310
according to the second example embodiment.
[0054]
10 The gateway 310 at least includes the transmitting unit 32 and
the receiving unit 33. [0055]
The transmitting unit 32 transmits, to the uplink device 510,
information on a location of the terminal device 410 (hereinafter
15 referred to as “the location information on the terminal device 410”)
which information is included in the Path Switch Request message . [0056]
The receiving unit 33 receives, from the second base station
210, information on a condition (Event parameter of Request Type
20 IE) for transmitting the location information on the terminal device
410 (hereinafter referred to as “condition information”) to the uplink device 510. [0057]
Next, operations of the communication system according to
25 the present example embodiment are described with reference to
Fig.9 [0058]
Steps S10, S20, S50, and S60 are the same as the steps in the first example embodiment.

17 [0059]
At step S31, the second base station 210 transmits, to the
gateway 310, the Path Switch Request message. Note that the
present example embodiment is different from the first example
5 embodiment in that in the former, the Path Switch Request message
does not need to include the condition information. [0060]
At step S41, the gateway 310 transmits the location
information on the terminal device 410 to the uplink device 510.
10 Note that the location information on the terminal device 410 ma y
be included in the Location Report message. [0061]
In the communication system according to the present
example embodiment, the gateway 310 can transmit, to the uplink
15 device 510, the location information on the terminal device 410
without changing the Path Switch Request message that is transmitted from the second base station 210 to the gateway 310. [0062]
Note that the gateway 300 or 310 according to each of the
20 above described example embodiments may have a configuration
other than the configuration illustrated in Fig.3 or Fig.8. Fig.10
illustrates a configuration of a gateway 320 that is a variation of the
gateway according to each of the above described example
embodiments.
25 [0063]
The gateway 320 at least includes a transmitting unit 34, a receiving unit 35, a determination unit 36 and a control unit 37. [0064]
The transmitting unit 34 is the same as the transmitting unit

18 30 or the transmitting unit 32.
[0065]
The receiving unit 35 is the same as the receiving unit 31 or
the receiving unit 33.
5 [0066]
The determination unit 36 determines whether to transmit, to
the uplink device, the location information on the terminal device
based on information received by the receiving unit 35. For
example, when the Path Switch Request message received by the
10 receiving unit 35 includes the Request Type IE, and the Request
Type IE indicates “Event=Change of serving cell,” the determination unit of the gateway according to the first example embodiment determines to transmit, to the uplink device, the terminal device ’s location information which is included in the Path Switch Request
15 message.
[0067]
The control unit 37 controls components included in the gateway 320. [0068]
20 Each processing according to the above described example
embodiments may be conducted by software. More specifically, a
CPU of an information processing device may read and execute a
computer program for conducting each processing. It is possible
to conduct processing having the same content as that of the
25 processing of the above described example embodiments even when
each processing is conducted using the program. Further, the
above described program may be stored in a non -transitory medium such as an ROM (Read Only Memory), an RAM (Random Access Memory), a semiconductor storage such as a flash memory, an

19 optical disc, a magnetic disc, and a magnet optical disc.
[0069]
The whole or part of the example embodiments disclosed
above can be described as, but not limited to, the following
5 supplementary notes.
[0070] (supplementary note 1)
A gateway in a communication system comprising a first base
station, a second base station, the gateway connected with the first
10 base station and the second base station, and a n uplink device
connected with the gateway, the gateway comprising:
a receiving unit that receives a P ath Switch Request message
from the second base station when a terminal device moves from a
cell covered by the first base station to a cell covered by the second
15 base station; and
a transmitting unit that transmits, to the uplink device, the
terminal device’s location information that is included in the Path
Switch Request message.
(supplementary note 2)
20 The gateway according to supplementary note 1, wherein the
gateway is an HeNB-GW. (supplementary note 3)
The gateway according to supplementary note 1 or 2, wherein
each of the first base station and the second base station is an HeNB.
25 [0071]
This application is based upon and claims the benefit of priority from Japanese patent application No. 20 15-061848, filed on March 25, 2015, the disclosure of which is incorporated herein in its entirety by reference.[Reference signs List]

20 [0072]
1 MME
2 HeNB-GW
3 eNB
5 4, 5 HeNB
20, 31, 33, 35 Receiving unit
21, 30, 32, 34 Transmitting unit

36 Determination unit
37 Control unit
10 100, 110 First base station
200, 210 Second base station
300, 310, 320 Gateway
6, 400 UE
500, 510 Uplink device

21 WE CLAIM:
1. A base station connected with a gateway that is also
connected with another base station, the base station comprising:
a receiving unit that receive s a message from the gateway;
5 and
a transmitting unit that transmits, to the gateway, a Path
Switch Request message that includes a Request Type IE and at least
either one of an ECGI and a TAI indicating a location of a terminal
device when the terminal device is moved from a cell covered by the
10 another base station.
2. A base station connected with a gateway that is also
connected with another base station, the base station comprising:
a receiving unit that receive s a message from the gateway;
15 and
a transmitting unit that transmits, to the gateway, first information on a location of a terminal device and second information on a change of a cell when the terminal device is moved from the cell covered by the another base station. 20
3. The base station according to claim 2, wherein the second
information is information on a condition for the gateway to
transmit the first information to a n uplink device that is connected
with the gateway.
25
4. The base station according to claim 2 or 3, where in the
second information is information that is included in a Request Type
IE.

22
5. The base station according to any one of claims 2 to 4,
wherein the first information is at least either one of an ECGI or a
TAI.
5 6. The base station according to any one of claims 2 to 5,
wherein the transmitting unit adds the second information to a Path Switch Request message, and transmits the Path Switch Request message to the gateway.
10 7. The base station according to any one of claims 2 to 6,
wherein the gateway is an HeNB-GW.
8. The base station according to any one of claims 2 to 7,
wherein the another base station is an HeNB .
15
9. A gateway that terminates a first base station and a second
base station, the gateway comprising:
a transmitting unit that transmit s a message to the second base station; and,
20 a receiving unit that receives, from the second base station,
first information on a location of a terminal device and second information on a change of a cell when the terminal device moves from the cell covered b y the first base station to the cell covered by the second base station.
25
10. A gateway in a communication system comprising a first base
station, a second base station, the gateway connected with the first
base station and the second base station, and a n uplink device
connected with the gateway, the gateway comprising:

23 a receiving unit that receives a Path Switch Request message
from the second base station when a terminal device moves from a
cell covered by the first base station to a cell covered by the second
base station; and
5 a transmitting unit that transmits, to the uplink device, the
terminal device’s location information that is included in the Path
Switch Request message.
Dated this 20th day of October 2017